Where is the dilator naris?
nasalis muscle
The dilator naris muscle (or alae nasi muscle) is a part of the nasalis muscle. It has an anterior and a posterior part. It has origins from the nasal notch of the maxilla and the major alar cartilage, and a single insertion near the margin of the nostril. It controls nostril width, including changes during breathing.
What does nasalis muscle do?
Also known as the compressor naris, the nasalis muscle is located within the nose. It works like a sphincter, or ring-like muscle. The muscle works as its alternative name suggests: to compress nasal cartilage. Also, it depresses the tip of the nose while it elevates the nostril’s corners.
What is the insertion of the nasalis muscle?
| Nasalis muscle | |
|---|---|
| Insertion | Nasal bone |
| Artery | Superior labial artery |
| Nerve | Buccal branch of the facial nerve |
| Actions | Compresses bridge, depresses tip of nose, elevates corners of nostrils |
What is the origin of the nasalis muscle?
| Nasalis muscle | |
|---|---|
| Origin | maxilla |
| Insertion | nasal bone |
| Artery | superior labial artery |
| Nerve | buccal branch of the facial nerve |
Where is the Buccinator muscle?
cheek
The buccinator muscle is the major facial muscle underlying the cheek. It holds the cheek to the teeth and assists with chewing. The buccinator muscle is served by the buccal branch of cranial nerve VII, also known as the facial nerve.
What does the orbicularis oculi muscle do?
The orbicularis oculi muscle closes the eyelids and assists in pumping the tears from the eye into the nasolacrimal duct system. The orbital section of the orbicularis oculi is more involved in the voluntary closure of the eyelid, such as with winking and forced squeezing.
What are Nasalis lines?
Bunny lines are wrinkles that appear on the bridge of the nose. The lines often become more prominent when smiling and can convey a false appearance of distaste. Bunny lines are also called nasal sidewall “scrunch lines”.
What does Nasalis mean?
Medical Definition of nasalis : a small muscle on each side of the nose that constricts the nasal aperture by the action of a triangular transverse portion which draws the lateral part of the aperture upward and a quadrangular alar portion which draws it downward.
What is Buccinator muscle?
The buccinator muscle plays an active role along with orbicularis oris and superior constrictor muscle during swallowing, mastication, blowing, and sucking. It aids in mastication and blowing by compressing the cheek inwards.
What is a platysma muscle?
The platysma is a broad muscle which arises from the fascia that covers the upper segments of the deltoid and pectoralis muscles. Its thin muscle fibers cross over the clavicle and proceed obliquely superiorly, laterally and medially over the neck.
What is the function of the compressor naris muscle?
Compressor naris muscle forms the transverse component of nasalis muscle, and is one of the muscles of the nose , a subset of the muscles of facial expression . Arterial supply Arterial supply Its overall action is to oppose the dilator naris and narrow the anterior nares
Which is part of nasalis has the name compressor?
The transverse part of nasalis wrinkles the nasal skin and compresses the nasal aperture, hence its other name compressor naris. The alar part dilates the nostrils as it pulls the ala laterally, thus its name dilator naris posterior.
Where are the nasalis muscles located in the body?
This article will discuss the anatomy and function of the nasalis muscle. Nasalis muscles are found on each side of the midline, respectively. Each muscle is composed of two parts; lateral or transverse part (compressor naris) and medial or alar part (dilator naris posterior).
Where is the alar part of the nasalis located?
The alar part lies lateral to the depressor septi muscle. A small muscle called dilator nasi anterior, or apicis nasi, attaches to the anterior margin of the alar part of nasalis muscle.